25mm HPLC Syringe Filter, Nylon (PA) 0.22μm 100 pcs. per-Bag add.packed in a blue PP-Box Hydrophilic Sample Retention <0.1 ml Pressure Rating: 87 psi Effective Filter Area: 4.08 cm² With Luer Lock-Inlet (female) and Luer Slip (male) high mechanical stability, i.e. wet + dry durable for aqueous and organic media (often used for pharmac. application)